Reginald belfield



' (No Model.) I R. BELPIELD.

SYSTEM OF ELBCTRIGAL TRANSLATIDN. No. 380,845.

Patented Apr. 10, 1888;.

N. PETERSPholo-hlhogmpher. Washingtnn. n. c.

UNITED STATEs PATENT OFFICE.

REGINALD BELFIELD, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE 'WESTINGHOUSE ELECTRIC COMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent; No. 380,845, dated April 10, 1888.

Application filed June 9, 1887. Serial No. 240,687. (No model.)

.To all whom it may concern.-

Be it known that I, REGINALD BELFIELD, a subject of the Queen of Great Britain, residing in Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Systems of Electric Translation, of which the following is a specification.

' This invention relates generally to a method I of and an organization of apparatus for distributing electric energy and automatically governing the same; and it relates more particularly to those systems of electric distribution in which alternating or such like electric r currents derived from any convenient source of electrical energy are employed. Such cur rents are usually transmitted through the primary coils of one or more inductoriums or converters, and the currents thereby induced in the secondary coils are employed for operating translating devicessuch, for example, as incandescent electric lights.

For the purpose of maintaining the lights at a constant brilliancy, it is desirable to the 2 successful operation of apparatus of this char acter that-the difference of potential at the respective terminals of the translating devices should be maintained approximately constant throughout any variations of resistance which 0 may occur in the external or translating circuit. For this purpose it is necessary to correspondingly vary the effective strength of current traversing the primary circuit, which is the same thing in effect as the maintaining 3 5 of an approximately-constant difference of po-. tential between the opposite terminals of the primary coil.

The object of this invention is, therefore, to provide means for securing such automatic 4o regulation as to at all times insure a desired difference of potential on the working-circuit throughout the variations of resistance therein.

The further object of the invention is to render it possible to diminish or increase the 5 brilliancy of the lights, as may be desired, and, having determined the required brilliancy, to render it constant.

The accompanying drawing is a diagram illustrating an organization of circuits and apparatus for carrying out the invention.

series, as indicated in dotted lines.

Referring to the figure, A represents a magneto or dynamo electric generator or other convenient source of electricity. The generator is designed to transmit alternating or such like currents upon a main line, L L, and it is constructed in any weltknown manner,having its field-magnets supplied in this instance by a dynamo, A, provided with an automatic governor, as indicated at A for the purpose of automatically maintaining a constant cur rent in its external circuit.

An induction apparatus, 13, of any suitable character, herein termed a converter, has its primary coil B included in the primary circuit L L. The coil B is included in a secondary circuit, L L, which supplies the current necessary to operate translating devices-such, for instance, as incandescing electric lamps, D D D 800. These last-named devices are included in multiple are between two supplyconductors, Z P. In other instances, however, it may be desired to include them in multiple As the various translating devices are inserted or withdrawn from the circuit, the resistance of the circuit is varied, and the'counter electromotive force developed in the circuit is also varied. It is by controlling the difference of potential at the terminal of the primary coil of the converter that it is designed by this invention to regulate the current produced and supplied to the translating devices. It is essential, therefore, that means be provided for controlling the current traversing the coil B, as the resistance between the conductors Z and l is varied. For this'purpose two coils, E and E, are applied by means of any suitable and convenient arrangement of winding'to a soft-iron core, F.

The primary coil B ofthe converter and the coil E of the regulator are connected by conductors L L in multiple arc in the main-line or generator circuit L L. The secondary coil 13 of the converter and the coil E of the regulator-are connected in series in the conductor L L The coils E and E are so wound with reference to each other and so connected that the currents traverse them in the same direction, thus tending to magnetize them in one direction only. When no lamps are in circuit, the current in the coil E is opposed only by its own counter electro-motive force, and the our rent through it will be at its highest limit.

\Vhen lamps are connected in circuit, the current in E is opposed also by counter electro-motive force due to the coil E, and this is determined by the number of lamps in circuit. Thus it will be understood that varying the resistance between the conductors Z and Z varies the opposition offered to the current traversing the line L L'". Thus, if theresistance is increased, by decreasing the number of translating devices D D &c., which are in circuit, the first action is to diminish the current flowing through the coil E, thus diminishing the counter electro-motive force in the coil E which allows more current to be shunted through the conductor L L", thereby diminishing the current traversing the primary coil B of the converter, and so maintaining the difference of potential between Z and Z approximately constant. This diminishes the current generated in the secondary coil B proportionately, and the translating devices remain constant.

It will be noticed that the increased current traversing the coil IE will tend to increase the counter electro-motive force in the coil E,and thus increase the resistance of the circuit L, and thus still further tend to cause the difference of potential at the translating devices to be constant. For the purpose of obtaining the desired balancing of the coils and also for diminishing and increasing the brilliancy of the lights, as may be required, the core F of the regulator may be adjustable with reference to the coils-as, for instance, by means of a handle, f.

I claim as my invention- 1. The combination, substantially as hereinbefore set forth, with an electric generator and a circuit for the same, of an induction-coil having its primary coil in said circuit, a air cuit including the secondary coil, means for varying the resistance of the secondary circu t, a soft-iron corc,and two coils acting upon said core, one of which coils is included in the secondary circuit and the other of which coils is in circuit with said primary coil.

2. The combination, with a source of electric currents and translating devices, of two converters having their primary coils connected with said source in multiple arc with each other and their secondary coils connected in series with each other and said translating devices.

3. The combination, with a source of electric currents and translating devices, of two converters having their primary coils connected with said source in multiple are with each other and their secondary coils connected in series with each other and said translating devices, and means for modifying the effective action of the core of one of said converters upon its coils.

In testimony whereofI have hereunto subscribed my name this 25th day of May, A. D. 1887.

REGINALD BELFIELD.

W'itnesscs:

DANL. W. EDGECOMB, CHARLES A. TERRY. 

